Based on these two summaries of the theology, they would run counter to my faith:
A one-sentence description of Gnosticism: a religion that differentiates the evil god of this world (who is identified with the god of the Old Testament) from a higher more abstract God revealed by Jesus Christ, a religion that regards this world as the creation of a series of evil archons/powers who wish to keep the human soul trapped in an evil physical body, a religion that preaches a hidden wisdom or knowledge only to a select group as necessary for salvation or escape from this world.
CATHOLIC ENCYCLOPEDIA: Gnosticism
A collective name for a large number of greatly-varying and pantheistic-idealistic sects, which flourished from some time before the Christian Era down to the fifth century, and which, while borrowing the phraseology and some of the tenets of the chief religions of the day, and especially of Christianity, held matter to be a deterioration of spirit, and the whole universe a depravation of the Deity, and taught the ultimate end of all being to be the overcoming of the grossness of matter and the return to the Parent-Spirit, which return they held to be inaugurated and facilitated by the appearance of some God-sent Saviour.
When Genesis speaks of Adam being specially made, the word neshama is used to describe the breath of God which made Adam a living soul. The soul of the animals in Genesis 1 (including homo sapiens on earth in my view) was called the nephesh. We have both of these and also the ruach which I think of as the pivot, deciding whether to be God-centered (neshamah) or carnally-centered (nephesh.) The differences are more thoroughly discussed on this thread.
So when Adam, in the Garden of Eden paradise in eternity, disobeyed - he was banished to the physical realm so that he would die. (Genesis 3:22-24)
The essence of Adam was his neshamah, and thus death entered the world through Adam. And so creation anxiously waits for the manifestation of the sons of God (Romans 8:19-22)
(For until the law sin was in the world: but sin is not imputed when there is no law.
Nevertheless death reigned from Adam to Moses, even over them that had not sinned after the similitude of Adam's transgression, who is the figure of him that was to come. Romans 5:12-14